Finding the Fourth Proportional to 12,546.36, 17,304.78 and 9,013.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,546.36 : 17,304.78 = 9,013.20 : x
2. Step 2: Convert to fraction form
   12,546.36/17,304.78 = 9,013.20/x
3. Step 3: Cross multiply
   12,546.36x = 17,304.78 × 9,013.20
4. Step 4: Simplify right side
   12,546.36x = 155,971,443.10
5. Step 5: Solve for x
   x = 155,971,443.10/12,546.36
6. Step 6: Final answer
   x = 12,431.61